https://bugs.llvm.org/show_bug.cgi?id=39764
Bug ID: 39764
Summary: Coroutine optimization change returned value when
using proxy type
Product: clang
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: C++2a
Assignee: unassignedclangb...@nondot.org
Reporter: sidney.cong...@gmail.com
CC: blitzrak...@gmail.com, erik.pilking...@gmail.com,
llvm-bugs@lists.llvm.org, richard-l...@metafoo.co.uk
I implemented a minimal promise type which returns a proxy converted to the
promise's member value when it's returned from the coroutine. This member value
is set by 'co_return' (by implementing 'return_value').
Some optimization seems to elide the local value, so the value set by calling
'co_return' is not returned :
https://wandbox.org/permlink/MdMuxwTjZdmM9xVi
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